Letter to the editor regarding 'changes in differential renal function after pyeloplasty in infants and children' by Josefin Nordenström, Giasemi Koutozi, Gundela Holmdahl, Kate Abrahamsson, Rune Sixt, Sofia Sjöström []
1 Paediatric Nephrology Unit, First Department of Paediatrics, Hippokratio Hospital, Aristotle University of Thessaloniki, 49th Konstantinoupoleos Street, 546 42, Thessaloniki, Greece. Electronic address: antigonipavlaki@yahoo.gr.
2 Paediatric Nephrology Unit, First Department of Paediatrics, Hippokratio Hospital, Aristotle University of Thessaloniki, 49th Konstantinoupoleos Street, 546 42, Thessaloniki, Greece.